Help needed---Open old PCB file created in 1990

[konglong]

Hi, there

I have some PCB files created in 1990, I have tried using OrCAD v10.0 and PowerPCB v5.0 to open them, but they are all failed.

Does someone know which program can open these files?

Thanks a lot.

 

[M!k]

can you post it here?

 

[House_Cat]

If you want to PM the files to me, I'll try and open them for you.

Have you tried looking at the files with a text editor or a hex editor. Often times the file will give the software name and version in ASCII characters at the beginning of the file.

 

[mhtplsh]

In those times protel was most famous. Try it.